A very very sick hand

Adrian's 2/5 game.

I shouldn't have played this hand the way I did but it had been a very slow day and I hadn't won a pot in hours. A relatively new player raised in 2nd position to $20, a weak player called as did one of the dealers from the game on the button. I looked down at 7 7 in the small blind and elected to call. The flop came Q 3 6 with two diamonds. I checked and the original raiser led out for $15 which stunk of a flush draw bet. The weak player called and he also stunk of a flush draw (he only called on his draws and bet/raised on his pairs and made hands. The dealer who was playing was in for $800 and had about $900 in front of him. He also just called so the action was back to me. My read on the situation was this: 1) I was playing tight all day and hadn't made very many moves. 2) The first 2 players were obviously drawing to either a flush or the open ended straight draw (4-5) and dealer (ironically he was on the button) wanted to see another card before commiting his money with top pair or maybe two pair. I decided to check raise another $55 on top. Both "flush draws" thought then called and then dealer called as well and I had to put him on a hand like 2 pair because with that much money in the pot and facing that strength from me he couldn't have called with just a Q and would have re-raised with a set to get his money in good. So 4 of us went to the turn, 2 flush draws and 2 pair. The turn came a K and I'm first to act I need to win this pot or get out but by the way the day was going I needed to win it somehow...what next? I'll finish posting what I did in this hand but I want to know how you guys would play it here...I had about $230 left and I had both flush draw players covered while dealer had us all covered.